Outer surface portion of an electronic enclosure



FIG. 1 is a perspective view of an outer surface portion of an electronic enclosure showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a right side elevational view thereof.

The broken line drawing of a portion of an electronic enclosure in all figure views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an outer surface portion of an electronic enclosure, as shown and described. 